Migrating Existing Java EE Applications to AS Java

Use this procedure to prepare applications developed for other platforms than SAP NetWeaver AS Java for running on AS Java. Preparation includes configuring platform-dependent settings such as the data source name, the JDBC connection URL, JNDI lookup Strings, and other environment entries.

In AS Java, there are two alternative ways to configure platform-specific settings:

Programmatically, by using the SAP-specific deployment descriptors (data-source-aliases.xml, ejb-j2ee-engine.xml, web-j2ee-engine.xml, application-j2ee-engine.xml and appclient-j2ee-engine.xml) inside the application
This approach is useful if your Java EE applications are to run on a single platform only. Each application carries environment information in its application archive, so you do not have to configure the respective settings additionally after deploying.
On the fly, by using the respective configurable properties in NetWeaver Administrator
This approach is useful if your applications are to run on multiple platforms. Different platforms have different landscapes, IP addresses and other specifics, so it is impossible to use the same deployment descriptor information for them. Instead, you can configure the related properties in NetWeaver Administrator on each platform after you deploy an application. In this way, the application does not need to contain that information in itself.

Procedure

Configuring Persistence Resources

The following table summarizes the links to available information about configuring persistence resources using the two alternative approaches:

NetWeaver Administrator	Inside Application
Managing JDBC DataSources Managing JDBC Drivers Managing JDBC DataSource Aliases	Configuring the Persistence Unit in the persistence.xml

Configuring EJB Resources

The following table summarizes the links to available information about configuring EJB resources using the two alternative approaches:

NetWeaver Administrator	Inside Application
Editing EJB Environment	Using Dependency Injection Setting the MDB Properties in the ejb-j2ee-engine.xml

Configuring JMS Resources

The following table summarizes the links to available information about configuring JMS resources using the two alternative approaches:

NetWeaver Administrator	Inside Application
Creating and Configuring JMS Virtual Providers (describes both approaches) Creating and Configuring JMS Resources and Resource References (describes both approaches) Using a Third-Party JMS Provider (describes both approaches) Creating a New JMS SAF Agent (describes both approaches)
	Using JMS Store-and-Forward

Configuring Java Connector Architecture (JCA) Resources

The following table summarizes the links to available information about configuring JCA resources using the two alternative approaches:

NetWeaver Administrator	Inside Application
Managing Resource Adapters Managing JCA Connection Factories	ManagedConnectionFactory Configuration Connection Pooling

Configuring Web Resources

The following table summarizes the links to available information about configuring Web resources using the two alternative approaches:

NetWeaver Administrator	Inside Application
Web Modules Configuration	web-j2ee-engine.xsd